Abstract
In this work, thin films of eight octasubstituted zinc(II) phthalocyanine derivative (ZnPcR 8) with tosylamido substituents R = –NHSO 2(C 6H 4)CH 3 were investigated as active layer of optical sensors for the detection of pentachlorophenol. Using total internal reflection ellipsometry (TIRE) technique response characteristics of ZnPcR 8 films to pentachlorophenol were studied in the concentration range from 0.1 to 20 μg/l. This was also validated for natural river and wastewater samples. It was demonstrated that the specific binding of pentachlorophenol molecules causes substantial shift of Δ( λ) spectrum. The minimum registered concentration of pentachlorophenol was 0.7 μg/l. For the river water and wastewater samples the detection limits as well as a working concentration ranges showed no significant difference with respect to those found in distilled water.
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